<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <title>404</title>
  </head>
  <body>
    <div class="mars"></div>
    <img src="static/404/404.svg" class="logo-404" />
    <img src="static/404/meteor.svg" class="meteor" />
    <p class="title">Oh no!!</p>
    <p class="subtitle">页面未找到<br />要么请求一个不再在这里的页面。</p>
    <img src="static/404/astronaut.svg" class="astronaut" />
    <img src="static/404/spaceship.svg" class="spaceship" />

    <style>
      @keyframes floating {
        from {
          transform: translateY(0px);
        }
        65% {
          transform: translateY(15px);
        }
        to {
          transform: translateY(0px);
        }
      }
      html {
        height: 100%;
      }

      body {
        background-image: url('static/404/star.svg'),
          linear-gradient(to bottom, #05007a, #4d007d);
        height: 100%;
        margin: 0;
        background-attachment: fixed;
        overflow: hidden;
      }

      .mars {
        left: 0;
        right: 0;
        bottom: 0;
        position: absolute;
        height: 27vmin;
        background: url('static/404/mars.svg') no-repeat bottom center;
        background-size: cover;
      }

      .logo-404 {
        position: absolute;
        margin-left: auto;
        margin-right: auto;
        left: 0;
        right: 0;
        top: 16vmin;
        width: 30vmin;
      }
      @media (max-width: 480px) and (min-width: 320px) {
        .logo-404 {
          top: 45vmin;
        }
      }

      .meteor {
        position: absolute;
        right: 2vmin;
        top: 16vmin;
      }

      .title {
        color: white;
        font-family: 'Nunito', sans-serif;
        font-weight: 600;
        text-align: center;
        font-size: 5vmin;
        margin-top: 31vmin;
      }
      @media (max-width: 480px) and (min-width: 320px) {
        .title {
          margin-top: 65vmin;
        }
      }

      .subtitle {
        color: white;
        font-family: 'Nunito', sans-serif;
        font-weight: 400;
        text-align: center;
        font-size: 3.5vmin;
        margin-top: -1vmin;
        margin-bottom: 9vmin;
      }

      .btn-back {
        border: 1px solid white;
        color: white;
        height: 5vmin;
        padding: 12px;
        font-family: 'Nunito', sans-serif;
        text-decoration: none;
        border-radius: 5px;
      }
      .btn-back:hover {
        background: white;
        color: #4d007d;
      }
      @media (max-width: 480px) and (min-width: 320px) {
        .btn-back {
          font-size: 3.5vmin;
        }
      }

      .astronaut {
        position: absolute;
        top: 18vmin;
        left: 10vmin;
        height: 30vmin;
        animation: floating 3s infinite ease-in-out;
      }
      @media (max-width: 480px) and (min-width: 320px) {
        .astronaut {
          top: 2vmin;
        }
      }

      .spaceship {
        position: absolute;
        bottom: 15vmin;
        right: 24vmin;
      }
      @media (max-width: 480px) and (min-width: 320px) {
        .spaceship {
          width: 45vmin;
          bottom: 18vmin;
        }
      }
    </style>
  </body>
</html>
